package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    private static final Logger log = LoggerFactory.getLogger(EmployeeServiceImpl.class);
    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对用户输入的密码进行md5加密
        String password_md5 = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password_md5.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
    /**
     * 新增员工
     *
     * @param employeeDTO
     * @return
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //这个DTO只是方便前段传过来的数据，
        // 但是我们新增操作时添加的更新时间，创建时间等还是用我们自己创的实体类
        //通过对象属性拷贝，把DTO里的属性拷贝到实体类Employee中
        Employee employee=new Employee();
        //拷贝,前提是属性名得一样
        BeanUtils.copyProperties(employeeDTO,employee);
        //防止硬编码，定义一个常量类，如果有改变可以直接改常量类而不是改代码。优雅~
        employee.setStatus(StatusConstant.ENABLE);
/*        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/
        //密码设置为默认，md5加密
//        String p="12345";
        //优雅~
        String p=PasswordConstant.DEFAULT_PASSWORD;
        String p_md5 = DigestUtils.md5DigestAsHex(p.getBytes());
        employee.setPassword(p_md5);
        //设置修改人的id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }


    /**
     * 分页查询
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        //
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total,result);
    }

    /**
     * 修改员工状态
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Integer id) {
        log.info("根据id直接修改status为{}",status);
//        employeeMapper.startOrStop(status,id);
        //为了后续更新操作的统一，这个就可以使用update方法了
        Employee employee=new Employee();
        employee.setId(Long.valueOf(id));
        employee.setStatus(status);
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee selectById(Integer id) {
        //覆盖密码
        Employee employee=employeeMapper.selectById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
/*        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }

}
